Line Codes for Clock Recovery with Low-Q Filtering

抄録

The principles of multiple block code (MBC) that feature in filter-less clock recovery are overviewed. Jitter generations are discussed to show that reducing the total amount of delay in MBC family coding can lead to suppressing jitter generation. Jitter accumulation in the repeater chain is also discussed to show that applying very low-Q filtering can drastically reduce the accumulation of high-frequency jitter. New members of MBC family codes for clock recovery with low-Q filtering that can reduce the total amount of delay in coding by a factor of six at the most are proposed. It is confirmed in an experimental set up that pattern dependent jitter can be reduced by a factor of three. An extended version of family members that can improve coding efficiency are proposed and confirmed in an experimental set up.